Circ Water Flashcards
1
Q
What is the De-icing flowpath?
A
- From a single unit discharge vault (WMO-16 or -26), through the de-ice tunnel and out the middle intake tunnel (WMO-30 is closed).
2
Q
What are the indications of icing?
A
- Circulating Water temperature ≤ 35°F.
- Frazzle Ice
- > 1 Foot of drawdown in the Forebay not caused by starting a CW Pump
- Traveling screens high and/or extreme high differential pressure alarms are annunciating with little or no trash collection in the screen wash trash
3
Q
What systems support the CW System?
A
- Chlorine Injection
- Miscellaneous Sealing and Cooling Water
- Screen Wash System
- Vacuum Priming
- 250v DC
4
Q
What are the CW System loads?
A
- NESW
- Chlorine Injection (x-tie header)
- Miscellaneous Sealing
Cooling Water (x-tie header) - Lawn Sprinkler System (x-tie header)
- TACW Heat Exchanger
- Main Condensers
- Feed Pump Condensers
- Radiological Liquid Waste
- Turbine Room Sump
- Overflow
5
Q
When do the CW outlet valves auto open?
A
- They auto open with associated CW pump auto start to prevent pump runnout
6
Q
Will CW outlet valves auto open on a manual CW pump start?
A
- No, you must manually open the CW outlet valves on a Manual CW Pump start. This prevents pump runout
7
Q
When do the CW outlet valves auto close?
A
- Auto close on associated CW pump breaker opening. - Prevents short cycling the system
8
Q
When will a CW pump auto start?
A
- With the CR Switch in Auto, the CW Pump will auto start on a failure of a running CW Pump. (Running CW control switch in Run with the breaker open.)
